Is Famotidine (Pepcid) Safe for Dogs?
Why it’s conditional
Famotidine is an acid reducer that veterinarians frequently use in dogs, so a single standard tablet is rarely dangerous. Risks appear with repeated unsupervised use, which can mask symptoms of a serious underlying problem. Combination products meant for humans may include other ingredients that are not safe for pets.
How to keep your pet safe
Use only plain famotidine, and only in the way your vet describes. If your dog has ongoing vomiting or poor appetite, get a diagnosis instead of treating the symptom at home.
Warning signs to watch for
Occasional mild effects such as drowsiness or soft stool; large ingestions may cause vomiting, loss of appetite, or diarrhea.
When to call the vet
Call your vet or a pet poison hotline if your dog ate several tablets or if the product contained other medications. Persistent vomiting should always be checked in person.
Common questions
My dog ate one of my Pepcid tablets — should I do anything?
A single plain famotidine tablet is rarely a problem for a dog, but a quick call to your vet or a poison hotline confirms it for your dog’s size. Check that the product is plain and not a combination formula.
My vet mentioned Pepcid for my dog’s stomach — can I dose it myself long term?
Only as your vet directs. Long-term unsupervised use can hide ulcers or other disease that needs diagnosis, so follow-up matters.
My dog ate a handful of Pepcid — is that bad?
A large number of tablets can cause vomiting and appetite loss in a dog. Call your vet or a poison hotline with the amount to decide whether monitoring at home is enough.
More medications hazards for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).